NiP/SAPO-11催化脂肪酸甲酯加氢脱氧及产物的异构化

Hydrodeoxygenation of fatty acid methyl esters and isomerization of products over NiP/SAPO-11 catalysts

摘要: 采用过量浸渍法制备了不同镍负载量的NiP/SAPO-11催化剂，并用N₂吸附-脱附、吡啶红外光谱、NH₃-TPD、H₂-TPR等技术对催化剂的物理化学性能进行了测试。脂肪酸甲酯催化加氢脱氧及产物异构化反应在固定床反应器上进行，液体产品分别用GC-MS和GC进行定性和定量分析。结果表明，在温度为340℃，压力为2.0 MPa，氢气流量为60 mL/min，重时空速为2.5 h^-1的操作条件下，当Ni负载量为3%（质量分数）时，原料转化率可以达到97.8%，C_15-18的收率84.5%，异构化率14.0%。

Abstract: NiP/SAPO-11 catalysts with various nickle loading amounts were prepared by the impregnation method, and their properties were determined by means of N₂ adsorption-desorption, DRIFTS of adsorbed pyridine, NH₃-TPD and H₂-TPR. The catalytic hydrodeoxygenation of fatty acid methyl esters (FAME) and isomerization of consecutive paraffin products were carried out in a fixed-bed continuous-flow reactor. Liquid products were qualitatively and quantitatively identified by GC-MS and GC respectively. Under the operation conditions of 340℃, 2.0 MPa, WHSV of 2.5 h^-1, H₂ of 60 mL/min, the catalyst with 3% nickel loading (mass content) attained the high conversion of FAME (97.8%), C_15-18 yield (84.5%) and isomerization rate (14.0%).